Orange II ≥85 % (dye content), certified by the Biological Stain Commission, Sigma-Aldrich®
Supplier: SIGMA-ALDRICH MICROSCOPY
Synonyms:
Tropaeolin OOO-2, acid orange 7, acid orange A, D and C Orange No. 4, 4-(2-Hydroxy-1-naphthylazo)benzenesulphonic acid sodium salt, Orange II sodium salt, p-(2-Hydroxy-1-naphthylazo)benzenesulphonic acid sodium salt, Gold orange
M-Clarity™ quality level = MQ200
Orange II sodium salt,(Certified by the Biological Stain Commission), Dye content ≥85 % (4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt; Acid Orange 7; Acid Orange A; Orange II; Tropaeolin 000 No. 2).
Certified for use in the Wilson-Ezrin method for pituitary acidophils, as a counterstain following Heidenhain′s or Weigert′s hematoxylin on paraffin sections, and as a substitute for orange G in Floemming′s triple stain.
Formula:
C₁₆H₁₁N₂NaO₄S MW: 350,32 g/mol Storage Temperature: Room Temperature |
MDL Number:
MFCD00011657 CAS Number: 633-96-5 EINECS: 211-199-0 |
Specification Test Results
Appearance (Form) | Powder |
Infrared spectrum | Conforms to Structure |
Wavelength, c = 0.01 g/L, H₂O | 480 - 486 nm |
Extinction Coefficient | ≥26500 |
Wavelength | 225 - 231 nm |
Biological Stain Commission, Commission Certified Number: | Pass |
Dye Content | ≥85% |
Carbon | 46.6 - 63.1% |
Nitrogen | 6.8 - 9.2% |
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